Nut-threading machine.



G SGHLAGHEER NUT THREADING MAGHINB.

APPLICATION FILED JAN. 5. 1914.

Patented June 9, 1914.

3 SHEETS SHEET 1.

52o; ye 30712626722587 X/IAZM I aha "M4111 CT. SUHLACHTER.

NUT I'HREADING MACHINE.

APPLIOATION FILED JAN.5. 1914.

1 U o m n u M m r w a T we 3 SHEETS-SHEET 2.

Patented June 9, 19H.

i x I Ji W G. SCHLACHTER.

NUT THREADING MACHINE.

APPLICATION FILED Mum. 1914.

L099J2$ Patented June 9,1914.

3 SHEETS-SHEET 3.

1 rum 1 km (Vb UM GEORGE SCHLACHTER, OF CLEVELAND, OHIO.

NUT-THREADING MACHINE.

Specification of Letters Patent.

Patented June 9, 191 1..

Application filed January 5, 1914. Serial No. 310,419.

To all whom it may concern Be it known that I, Gnoncn SoHLAci-rrnn, a sub ect of the King of Hungary, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Nut- Threading Machines, of which the following is a specification.

This invention relates to nut threading machines.

An object of the invention is to provide a machine which shall, in a novel and practical manner, be capable of threading a greater number of nuts in a specified time than has heretofore been accomplished with machines of this character, and in which the result secured can be accomplished in a much cheaper manner, inasmuch as the number of attendants required will be materially lessened, and the danger of breakage of the parts be reduced to the minimum.

With the above and other objects in view as will appear as the nature of the invention is better understood, the same consists generally stated, in a nut threading machine embodying a positively driven spindle carrying a pair of clutches, a tap adapted alternately to be engaged by the chucks, means for intermittently positioning nuts upon the tap, means for removing a predetermined number of nuts from the tap to a point beyond the initial tap gripping means, and means for discharging the finished nuts from the machine.

The invention consists further in the various novel details and arrangement of parts of a nut threading machine as will be hereinaftcr fully described and claimed.

In the accompanying drawings forming a part of this specification, and in which like characters of reference indicate corresponding parts :Figure 1 is a view in side elevation of a nut-threading machine constructed in accordance with the present invention. Fig. 2 is a loi'igitudinal sectional view taken on the line 22, Fig. 1. Fig. 3 is an enlarged detail view of the receiving end of the machine. Fig. 4 is a transverse sectional view taken on the line tl, Fig. 2. Fig. 5 is a similar view taken on the line 55, Fig. 2. Fig. 6 is a similar view taken on the line 66, Fig. 2. Fig.' 7 is a transverse sectional view taken on the line 7-7, Fig. 1. Fig. 8 is a transverse sectional view taken on the line 88, Fig. 1. Fig. 9 is a transverse sectional view taken on the line 9--9, Fig. 1. Fig. 10 is a side elevation, partly in section, of one of the nut ejectors, and Fig. 11 is a longitudinal sectional view through the spindle and attached parts.

Referring to the drawings, A designates generally, the bed of the machine which is supported upon uprights B, the latter resting at their lower ends upon a pan C that is designed to catch debris and oil accumulating in the operation of the machine, the pan being supported by suitable legs 1). As the precise construction of the frame does not enter into the novelty of the invention, further description thereof is deemed unnecessary.

Journaled in the uprights B is a shaft 1 carrying five peripherally grooved cam drums 2, 3, 4:, 5, and 6. The cam 2 is of the siX-throw type, while the remaining cams are of the two-throw type. The shaft 1 is driven from any suitable source of power and carries on one end a pulley 7 around which passes a belt 8, indicated by dotted lines in Fig. 1 that passes around a pulley 9 carried by one end of the spindle oi' the machine. The spindle comprises four sections 10, 11, 12 and 13, the members 11, and 12 being connected by threads 14-. The member 10 is provided at its inner end with a chuck head 15, the parts being integral, and the chuck carries four radially-arranged jaws 16, the inner ends of which have inset therein serrated fillers 17, the function of which will presently appear. The j aws normally project beyond the outer periphery of the head and are beveled at one end, and these beveled portions are designed to be engaged by rollers 18 carried by arms 19 projecting from a sleeve 20 mounted upon the spindle member 10, the jaws 16 being normally held in the path of movement of the rollers by coiled springs 2O seated in sockets 21 in the chuck head 15 and bearing against the terminals of the pin 22 which extends through the jaw, as clearly shown in Fig. 9. The sleeve 20 is guided relatively to the head 15 by a plurality of pins 23 that engage with sockets 21 formed in the chuck head. The sleeve and its complemental parts, as above described, constitute a means for closing the jaws of the chuck to bring the same into engagement with the shank 25 of the tap 26, the latter being provided at its rear end with a squared portion 27 to be engaged by the chuck jaws. Mounted to slide upon the sections 11 and 12 of the spindle is a collar 28, and secured to this collar is one of the nut ejectors shown in de tail in Fig. 10, each ejector comprising a tubular member 29 having its bore flared at 30, four inwardly-curved resilient fingers 31 terminating internally with cam-shaped lugs 32, and a pair of laterally-projecting orificed lugs 33 that are designed to project through slots 34 formed in the spindle members 11 and 12. The spindle member 11 is provided at one end with a flange 35 that is securely bolted to the chuck head and holds the same rigid in operation.

The spindle section 12 carries a chuck head 36, the counterpart of that already described, and with which co-acts a collar 37, the counterpart of the collar 20, and carrying chuck jaw-closing mechanism, the same as that described. The section 13 of the spindle is provided with a flange 38 that is bolted to the chuck head 36 in the same manner as the flange 35. The section 13 is provided with four longitudinal slots 39 (Fig. 5) through which project screws carried by a peripheral grooved collar 40 that engages with a nut ejector 41, the counterpart of that shown in Fig. 10, with the difference that it is somewhat shorter, for the purpose that will presently appear. Adjacent to the outer end of the spindle is a squared portion 42 that is designed to be engaged by the jaws carried by the chuck head 36, the slots 39 terminating short of the outer end of the section 13 in order to prevent its ac cidental disconnection therefrom.

In order to support the spindle for rotation, one end thereof is journaled in the upright or'standard B, and the other end in a similar standard E supported by the bed A.

Arranged in front of the collar 40 is a block 43 (Fig. 7 provided with a longitudinally-disposed channel in which works a plunger 44, the plunger being provided with a bore 45 to receive the end of the tap and its lower side being oppositely beveled at 46 to engage the similarly-shaped bottom of the groove in the block, thus to guide the plunger in operation. Communicating in any suitable manner with the groove of the block is a magazine 47 in which the blank nuts N are disposed, and feed by gravity down into the groove of the block from which they are forced by the plunger onto the threaded end of the tap.

As will be obvious, all of the parts should be so timed as to insure accuracy of operation, and in the present instance, it is designed that siX nut-s at a time shall be discharged from the rear end 10 of the spindle, and this is accomplished by making the cam 2 of the six-throw type as before described. This cam is engaged by the lower end of a lever 48 pivoted at 49 to the bed, and having its upper end seated in a recess in the outer end 50 of the plunger. As shown in Fig. 8, the plunger is in two parts, the part 50 being seated in a dovetail shaped recess in the plunger and being held therein by a screw 51.

The cum 3 is engaged by the lower end of a lever 52 pivoted at 53 to the bed, the upper end of the lever being in engagement with the peripheral groove of the sleeve 40. The cam 4 is engaged by the lower end of the lever 54 pivoted at 55 to the bed, the upper end of the lever being in engagement with the peripheral groove of the sleeve 37.

The cam 5 is engaged by the lower end of a lever 56 pivoted at 57 to the bed, the upper end of which engages with the peripheral groove in the collar 28, while the earn 6 is engaged by the lower end of the lever 58 pivoted at 59 to the bed and having its upper end in engagement with the groove of the collar 20.

In the operation of the apparatus, the spindle being positively driven and carrying with it the tap, the parts will be in the position shown in Fig. 1 wherein the jaws of the chuck 36 are locked and those of the chuck 15 unlocked. As the machine is driven, and the plunger feeds the nuts onto the tap, these will be progressively threaded and forced through the nut ejector 41, along the shank of the tap, the fingers of the ejector closing in behind each nut as it is proj ected through the carrier, so that there can be no retrograde movement of the nuts. As soon as six nuts have been disposed upon the shank, the portion of the cam groove necessary to throw the lever 52 becomes operative and shifts the sleeve or collar 40 toward the chuck 36, and at the same time the lever 54 will be operated to open the jaws of the chuck 36 and close those of the chuck 15 so that at all times the tap will be driven. As the operation proceeds, the ejector 29 will become filled with nuts, and as the collar 28 is reciprocated by the cam 5, it will be forced on to the shank of the spindle in advance of the fingers 31 and upon the cam 5 actuating the collar 28 to the left, the ejector 29 will be projected between the jaws of the chuck 15 which have been previously opened while those of the chuck 36 have been closed. When the ejector 29 is moved forward to bring its fingers within or between the jaws of the chuck 15, the contained nuts will be forced off of the shank and into the portion 10 of the spindle, whereupon the cam 5 will re-actuate the collar 28 in the opposite direction, to bring it back to permit the nut ejector to receive a fresh charge of nuts, the chuck 15 being now locked and the chuck 36 unlocked.

The operation of the apparatus is exceedingly rapid and effective, and will require no attention other than to see that the parts are properly oiled and that the magazine is supplied with blank nuts. Heretofore, it has been found in machines of this character, that an attendant will be required for each machine, whereas in the present, a girl can readily attend to two, and the output of the machine can readily be made double that of the ordinary machine on the market.

Claims for the specific construction of the ejector here shown and described are not made in this application, as said ejector and its operating means constitute the subject matter of a divisional application filed by me under date of January 5, 1914, Serial No. 810,420.

Having fully described my invention, what I claim as new is 1. In a nut threading machine, a continuously rotating tap, means for positioning nuts thereon, means for gripping and rotating the tap during the threading of a plurality of nuts and for releasing the gripping means when such nuts are threaded, and means for moving the threaded nuts along the shank of the tap and positively projecting them without the machine.

2. In a nut threading machine, a hollow rotatable spindle, a pair of chucks rigid therewith, means for alternately opening and closing the jaws of the chucks, a tap having a shank arranged to be alternately engaged by the chuck jaws, means for positioning blank nuts on the tap, and means reciprocable within the spindle to remove the threaded nuts and positively discharge them from the machine.

3. In a nut threading machine, a hollova rotatable spindle, a pair of chucks rigid therewith, means for alternately opening and closing the jaws of the chucks, a tap having a shank arranged to be alternately engaged by the chuck jaws, means for positioning blank nuts on the tap, and means reciprocable within the spindle for progressively moving the threaded nuts along the tap shank from one chuck through and beyond the other chuck and positively ejecting them.

4. In a nut threading machine, a continuously rotating tap, means for intermittently positioning nuts thereon, means for gripping and rotating the tap during the threading of a predetermined number of nuts, timed mechanism for releasing the gripping means and actuating the nut feeding mechanism, and means for moving the threaded nuts along the thread of the shank of the tap and positively projecting them without the machine.

In testimony whereof I affix my signature in presence of two witnesses.

GEQRGE SCHLAGI-ITER.

\Vitnesses:

JOHN SZAIBEL, VENDEL GRUBER.

ioflu a! thin patent may be obtained for five cent each, by :ddrenin: the Gonmhuloner of Pltlltl, Washington, D, G." 

